kernel/irq/manage.c

1375 	if (new->flags & (IRQF_NO_THREAD | IRQF_PERCPU | IRQF_ONESHOT))
1385 	new->flags |= IRQF_ONESHOT;
1583 		new->flags &= ~IRQF_ONESHOT;
1653 		if ((old->flags & IRQF_ONESHOT) &&
1655 			new->flags |= IRQF_ONESHOT;
1656 		else if ((old->flags ^ new->flags) & IRQF_ONESHOT)
1683 	if (new->flags & IRQF_ONESHOT) {
1695 		 * IRQF_ONESHOT thread handler has been woken, but not
1776 		if (new->flags & IRQF_ONESHOT)
2149  *	IRQF_ONESHOT		Run thread_fn with interrupt line masked